<template>
  <div>
    <el-upload
      :action="uploadUrl"
      :before-upload="handleBeforeUpload"
      :on-success="handleUploadSuccess"
      :on-error="handleUploadError"
      name="file"
      :show-file-list="false"
      :headers="headers"
      style="display: none"
      ref="upload"
      v-if="this.type == 'url'"
    >
    </el-upload>
    <div class="editor" ref="editor" :style="styles"></div>
  </div>
</template>
<!-- 自定义配置文档 -->
<!-- https://devpress.csdn.net/vue/66cd6957c618435984a2757f.html -->
<!-- 官网 -->
<!-- https://static.kancloud.cn/liuwave/quill -->
<script>
import Quill from "quill";
import "quill/dist/quill.core.css";
import "quill/dist/quill.snow.css";
import "quill/dist/quill.bubble.css";
import { getToken } from "@/utils/auth";
import { UPLOADURL } from "@/api/useMenu/config";
import "./quillEditor.css"; //自定义css

// 自定义字体
const FONTFAMILY = [
  "Montserrat",
  "宋体",
  "黑体",
  "微软雅黑",
  "楷体",
  "仿宋",
  "Arial",
  "苹方",
];
Quill.imports["attributors/style/font"].whitelist = FONTFAMILY;
Quill.register(Quill.imports["attributors/style/font"]);

// 行高
import { lineHeightStyle } from "./lineHeight.js";
Quill.register({ "formats/lineHeight": lineHeightStyle }, true);

// 行间距
import { letterSpacingStyle } from "./letterSpacing.js";
Quill.register({ "formats/letterSpacing": letterSpacingStyle }, true);

export default {
  name: "Editor",
  props: {
    /* 编辑器的内容 */
    value: {
      type: String,
      default: "",
    },
    /* 高度 */
    height: {
      type: Number,
      default: null,
    },
    /* 最小高度 */
    minHeight: {
      type: Number,
      default: null,
    },
    /* 只读 */
    readOnly: {
      type: Boolean,
      default: false,
    },
    /* 上传文件大小限制(MB) */
    fileSize: {
      type: Number,
      default: 20,
    },
    /* 类型（base64格式、url格式） */
    type: {
      type: String,
      default: "url",
    },
  },
  data() {
    return {
      // uploadUrl: process.env.VUE_APP_BASE_API + "/common/upload", // 上传的图片服务器地址
      uploadUrl: process.env.VUE_APP_BASE_API + UPLOADURL, // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      Quill: null,
      currentValue: "",
      options: {
        theme: "snow",
        bounds: document.body,
        debug: "warn",
        modules: {
          // 工具栏配置
          // toolbar: [
          //   ["bold", "italic", "underline", "strike"], // 加粗 斜体 下划线 删除线

          //   [{ list: "ordered" }, { list: "bullet" }], // 有序、无序列表
          //   [{ indent: "-1" }, { indent: "+1" }], // 缩进
          //   // [{ size: ["small", false, "large", "huge"] }], // 字体大小
          //   [
          //     {
          //       size: [
          //         "12",
          //         "14",
          //         "16",
          //         "18",
          //         "20",
          //         "22",
          //         "24",
          //         "26",
          //         "28",
          //         "30",
          //         "32",
          //         "34",
          //         "36",
          //       ],
          //     },
          //   ], // 字体大小
          //   [{ font: FONTFAMILY }], // 字体

          //   [
          //     {
          //       lineheight: ["initial", "1", "1.5", "1.75", "2", "3", "4", "5"],
          //     },
          //   ], //行高
          //   [
          //     {
          //       letterSpacing: [
          //         "initial",
          //         "2px",
          //         "4px",
          //         "6px",
          //         "8px",
          //         "10px",
          //         "12px",
          //         "14px",
          //         "16px",
          //       ],
          //     },
          //   ], //行间距
          //   [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
          //   ["blockquote", "code-block"], // 引用  代码块
          //   // [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
          //   [{ color: [] }], // 字体颜色
          //   [{ background: [] }], // 字体背景颜色
          //   [{ align: [] }], // 对齐方式
          //   ["clean"], // 清除文本格式
          //   ["link", "image", "video"], // 链接、图片、视频
          // ],
          toolbar: {
            container: [
              ["bold", "italic", "underline", "strike"], // 加粗 斜体 下划线 删除线

              [{ list: "ordered" }, { list: "bullet" }], // 有序、无序列表
              [{ indent: "-1" }, { indent: "+1" }], // 缩进
              // [{ size: ["small", false, "large", "huge"] }], // 字体大小
              [
                {
                  size: [
                    "12",
                    "14",
                    "16",
                    "18",
                    "20",
                    "22",
                    "24",
                    "26",
                    "28",
                    "30",
                    "32",
                    "34",
                    "36",
                  ],
                },
              ], // 字体大小
              [{ font: FONTFAMILY }], // 字体

              [
                {
                  lineheight: [
                    "initial",
                    "1",
                    "1.5",
                    "1.75",
                    "2",
                    "3",
                    "4",
                    "5",
                  ],
                },
              ], //行高
              [
                {
                  letterSpacing: [
                    "initial",
                    "2px",
                    "4px",
                    "6px",
                    "8px",
                    "10px",
                    "12px",
                    "14px",
                    "16px",
                  ],
                },
              ], //行间距
              [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
              ["blockquote", "code-block"], // 引用  代码块
              // [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
              [{ color: [] }], // 字体颜色
              [{ background: [] }], // 字体背景颜色
              [{ align: [] }], // 对齐方式
              ["clean"], // 清除文本格式
              ["link", "image", "video"], // 链接、图片、视频
            ],
            handlers: {
              letterSpacing: function (value) {
                if (value) {
                  this.quill.format("letterSpacing", value);
                } else {
                  console.log(value);
                }
              },
              lineheight: function (value) {
                if (value) {
                  this.quill.format("lineHeight", value);
                } else {
                  console.log(value);
                }
              },
            },
          },
        },
        placeholder: "请输入内容",
        readOnly: this.readOnly,
      },
    };
  },
  computed: {
    styles() {
      let style = {};
      if (this.minHeight) {
        style.minHeight = `${this.minHeight}px`;
      }
      if (this.height) {
        style.height = `${this.height}px`;
      }
      return style;
    },
  },
  watch: {
    value: {
      handler(val) {
        if (val !== this.currentValue) {
          this.currentValue = val === null ? "" : val;
          if (this.Quill) {
            this.Quill.pasteHTML(this.currentValue);
          }
        }
      },
      immediate: true,
    },
  },
  mounted() {
    this.init();
  },
  beforeDestroy() {
    this.Quill = null;
  },
  methods: {
    init() {
      const editor = this.$refs.editor;
      this.Quill = new Quill(editor, this.options);
      // 鼠标悬浮提示
      this.addQuillTitle();
      // 如果设置了上传地址则自定义图片上传事件
      if (this.type == "url") {
        let toolbar = this.Quill.getModule("toolbar");
        toolbar.addHandler("image", value => {
          if (value) {
            this.$refs.upload.$children[0].$refs.input.click();
          } else {
            this.quill.format("image", false);
          }
        });
      }
      this.Quill.pasteHTML(this.currentValue);
      this.Quill.on("text-change", (delta, oldDelta, source) => {
        const html = this.$refs.editor.children[0].innerHTML;
        const text = this.Quill.getText();
        const quill = this.Quill;
        this.currentValue = html;
        this.$emit("input", html);
        this.$emit("on-change", { html, text, quill });
      });
      this.Quill.on("text-change", (delta, oldDelta, source) => {
        this.$emit("on-text-change", delta, oldDelta, source);
      });
      this.Quill.on("selection-change", (range, oldRange, source) => {
        this.$emit("on-selection-change", range, oldRange, source);
      });
      this.Quill.on("editor-change", (eventName, ...args) => {
        this.$emit("on-editor-change", eventName, ...args);
      });
    },
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      const type = ["image/jpeg", "image/jpg", "image/png", "image/svg"];
      const isJPG = type.includes(file.type);
      // 检验文件格式
      if (!isJPG) {
        this.$message.error(`图片格式错误!`);
        return false;
      }
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      return true;
    },
    handleUploadSuccess(res, file) {
      // 如果上传成功
      if (res.code == 200) {
        // 获取富文本组件实例
        let quill = this.Quill;
        // 获取光标所在位置
        let length = quill.getSelection().index;
        // 插入图片  res.url为服务器返回的图片地址
        quill.insertEmbed(
          length,
          "image",
          // process.env.VUE_APP_BASE_API + res.fileName
          res.msg
        );
        // 调整光标到最后
        quill.setSelection(length + 1);
      } else {
        this.$message.error("图片插入失败");
      }
    },
    handleUploadError() {
      this.$message.error("图片插入失败");
    },
    addQuillTitle() {
      const titleConfig = {
        "ql-bold": "加粗",
        "ql-color": "字体颜色",
        "ql-font": "字体",
        "ql-code": "插入代码",
        "ql-italic": "斜体",
        "ql-link": "添加链接",
        "ql-background": "字体背景颜色",
        "ql-size": "字体大小",
        "ql-strike": "删除线",
        "ql-script": "上标/下标",
        "ql-underline": "下划线",
        "ql-blockquote": "引用",
        "ql-header": "标题",
        "ql-indent": "缩进",
        "ql-list": "列表",
        "ql-align": "文本对齐",
        "ql-direction": "文本方向",
        "ql-code-block": "代码块",
        "ql-formula": "公式",
        "ql-image": "图片",
        "ql-video": "视频",
        "ql-clean": "清除字体样式",
        "ql-lineheight": "行高",
        "ql-letterSpacing": "字符间距",
      };
      let oToolBar = document.querySelector(".ql-toolbar");
      if (!oToolBar) {
        return;
      }
      let aButton = oToolBar.querySelectorAll("button");
      let aSelect = oToolBar.querySelectorAll("select");
      aButton.forEach(function (item) {
        if (item.className === "ql-script") {
          item.value === "sub" ? (item.title = "下标") : (item.title = "上标");
        } else if (item.className === "ql-indent") {
          item.value === "+1"
            ? (item.title = "向右缩进")
            : (item.title = "向左缩进");
        } else if (item.className === "ql-list") {
          item.value === "ordered"
            ? (item.title = "有序列表")
            : (item.title = "无序列表");
        } else {
          item.title = titleConfig[item.classList[0]];
        }
      });
      aSelect.forEach(function (item) {
        item.parentNode.title = titleConfig[item.classList[0]];
      });
    },
  },
};
</script>

<style>
.editor,
.ql-toolbar {
  white-space: pre-wrap !important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}
.ql-snow .ql-tooltip[data-mode="link"]::before {
  content: "请输入链接地址:";
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: "保存";
  padding-right: 0px;
}
.ql-snow .ql-tooltip[data-mode="video"]::before {
  content: "请输入视频地址:";
}
.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: "14px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="small"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="small"]::before {
  content: "10px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="large"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="large"]::before {
  content: "18px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="huge"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="huge"]::before {
  content: "32px";
}
.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: "文本";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
  content: "标题1";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
  content: "标题2";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
  content: "标题3";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
  content: "标题4";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
  content: "标题5";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
  content: "标题6";
}
.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: "标准字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
  content: "衬线字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
  content: "等宽字体";
}
</style>
